Bathtub step



FIG. 1 is a front, right top perspective view of the bathtub step of the first variant;

FIG. 2 is a rear, top, right perspective view of the bathtub step of the first variant;

FIG. 3 is a top view of the bathtub step of the first variant;

FIG. 4 is a bottom view of the bathtub step of the first variant;

FIG. 5 is a front view of the bathtub step of the first variant;

FIG. 6 is a rear view of the bathtub step of the first variant;

FIG. 7 is a left side view of the bathtub step of the first variant;

FIG. 8 is a right-side view of the bathtub step of the first variant;

FIG. 9 is a front, right top perspective view of the bathtub step of the second variant;

FIG. 10 is a rear, top, right perspective view of the bathtub step of the second variant;

FIG. 11 is a top view of the bathtub step of the second variant;

FIG. 12 is a bottom view of the bathtub step of the second variant;

FIG. 13 is a front view of the bathtub step of the second variant;

FIG. 14 is a rear view of the bathtub step of the second variant;

FIG. 15 is a left side view of the bathtub step of the second variant; and,

FIG. 16 is a right-side view of the bathtub step of the second variant. 

CLAIM The ornamental design for a bathtub step, as shown and described. 